Packing.



No. 785,492. PATENTED MAR. 21, 1905.

0. G. HOLMBERG.

PACKING.

APPLICATION I'ILED JULY 30. 1904.

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- IIVVEIVTOR, harleo G,H0l mlwrg ATTORNEYS No. 785,492. PATENTED MAR.21, 1905.

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PACKING.

APPLICATION FILED JULY 30, 1904.

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' lnnlllll "Hill UVVE/VTOR C harlea' G. Helm/buy WW r6- ATTORNEYSlJNiTED STATES Patented March 21, 1905.

PATENT OF ICE.

CHARLES GUSTAVE HOLMBERG, OF VVOONSOOKET, SOUTH DAKOTA, ASSIGNOR OF ONE-HALF TO ANNA HOLMBERG. OF VVOONSOCKET,

SOUTH DAKOTA.

PACKING.

SPECIFICATION forming part of Letters Patent No. 785,492, dated. March21, 1905.

Application filed July 30, 1904. Serial No. 218,791.

To (ti/Z whom, it may concern:

Be it known that I, CHARLES GUsTAvE HOLMBERG, a citizen of the UnitedStates, and a resident of WVoonsocket, in the county of Sanborn andState of South Dakota, have invented a new and Improved Packing, ofwhich the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved packing,more especially designed for packing the pistons of engines preferablysuch, for instance, as shown and described in the Letters Patent of theUnited States N 0. 687,628, granted to me N ovember 26, 19()1the packingbeing simple and durable in construction, easily applied, and arrangedto yield in every direction to prevent leakage of the motive agentwithout creating undue friction.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in Whichsimilar characters of reference indicate corresponding parts in all thefigures.

Figure 1 is a side elevation of the improvement as applied to the istonin an engine of the kind above referre to, the cover of the enginecylinder being removed and other parts of the engine being in section.Fig. 2 is a cross-sectionof the cylinder on the line 2 2 of Fig. 1,showing the piston and packing in elevation. Fig. 3 is an enlarged sideelevation of the piston-body. Fig. 4 is a cross-section of the same onthe line 4 4 of Fig. 3 with the packing in position. Fig. 5 is aperspective view of one of the packing-rings for the hub of the piston,and Fig. 6 is a similar view of one of the packing-bars for the rings ofthe piston.

In the heads A of the cylinder A of the engine is journaled the shaft A,carrying the hub B of a piston having diametrically-extending wings B,as plainly illustrated in the drawings. On the hub B and near each endthereof is secured a ring O, formed on its forward face with teeth 0 inmesh with correturn with the hub, owing to the meshing of the teeth Dwith the teeth C.

The edges of each of the wings B are formed with recesses B both at thesides and top to receive packing-bars F and F, pressed outwardly bysprings G, set in the recesses in the said rings B, as plainly indicatedin Fig.

4. The packing-bars F in the lower portions of the side'recesses of therings D are formed with lugs F extending into corresponding recesses Dformed in the packing-rings D, and the adjacent ends F of thepacking-bars F and F are halved to overlap, as plainly indicated inFigs. 1 and 6, to prevent escape of the steam between adjacentpacking-bars and also to prevent the escape of steam between thepacking-bars F and the packingrings D, owing to the lug F abovedescribed. The packing-bars F are preferably made L shape, so as toextend partly in the side grooves of the wings B and also in the endgroove thereof, and in order to prevent leakage of steam between thehalved ends F of the bars F and F a sustaining-plate H is provided,secured to one of the bars F and extending throughout the joint of thetwo bars. (See Fig. 4.) Packing-bars I are also arranged in theabutments J, fixed in the cylinder A, and the said packing-bars I arepressed by flat springs in contact with the peripheral face of the hubB, as plainly shown in Fig. 1, to prevent leakage from one side of thecylinder to the other.

The packing described is very simple and durable in construction and canbe easily placed in position on the hub and rings of the piston and whenso applied all leakage of the motive agent is prevented and frictionbetween the contacting parts is reduced to a minimum.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A piston-packing comprising a ring having teethand fixed on the hub of the piston, and a spring-pressed packing-ringslidable on the piston and having teeth in mesh with the teeth on thesaid fixed ring.

2. A piston-packing comprising a fixed toothed ring on the piston-hub,springpressed rings slidable on the ends of the said hub and havingrecesses, and spring-pressed bars slidable on the side edges of thepistonwings and having bars provided with lugs engaging the saidrecesses.

3. The combination with an engine-piston consisting of a hub anddiametrical wings having grooves in their edges, of a packing comprisinga fixed ring on the said hub and provided with teeth, a toothed ringslidable on the hub and engaging the teeth on the said fixed ring,springs set in the said hub and pressing the said slidable ring, andspring-pressed bars slidable in the said grooves of the piston-wings.

4. The combination with an engine-piston consisting of a hub anddiametrical wings having grooves in their edges, of a packing comprisinga fixed ring on the said hub and provided with teeth, a toothed ringslidable on the hub and engaging the teeth on the said fixed ring,springs set in the said hub and pressing the said slidable ring,springpressed bars slidable in the said grooves of the piston-wings, thebars having halved end portions, and a sustainin -plate secured to oneof the bars and over apping the halved ends of adjacent bars.

5. The combination with an engine-piston consisting of a hub anddiametrical wings having grooves in their edges, of a packing comprisinga fixed ring on the said hub and provided with teeth, a toothed ringslidable on the hub and engaging the teeth on the said fixed rings,springs set in the said hub and pressing the said slidable ring, andspring-pressed bars slidable in the said grooves of the piston-wings,the bars having halved end portions overlapping each other.

6. The combination with an engine-piston consisting of a hub anddiametrical wings having grooves in their edges, of a packing comprisinga fixed ring on the said hub and provided with teeth, a toothed ringslidable on the hub and engaging the teeth on the said fixed ring,springs set in the said hub and pressing the said slidable ring, andspring-pressed bars slidable in the said grooves of the pistonwings, theends of the bars adjacent to the hub having integral lugs projectinginto recesses in the slidable packing-rmgs.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES GUSTAVE HOLMBERG.

